Taking-off of webs or fleeces from smooth rollers



| CROWTHER Aug. 5,;1952

' TAKING-OFF 0F WEBS OR FLEECES FROM SMOOTH ROLLERS Y 2 SHEETS-[SHEET 1 Filed Feb. 18, 1947 I A 1952 L. CROWTHER 2,605,511

I TAKING-OFF OF WEBS OR FLEECES FROM SMOOTH ROLLERS I Filed Feb. 18, 1947 2 SHEETS-SHEET 2 4o ii I 18 "CARD CLOTHED" -CARD CLOTHED- lii A W il Patented Aug. 5, 12352 e zrenr OFFICE c I w2-;e05,511: 1 P I 'rAKmG-orr-ofvvims oaFnEEoEs-FRoM p i sincere ROLL RS; fLawrence GrowtherQ-Pudsey, Englaml assignor. I to,- HubertDuesberg, Heusyw verviers Belgium. f l Asmara-ea February-"18, 194v; serialNoi 729L27 I Iir G'l-eatPBritain Feliruarygsi 1946 claims (01;. 19-61) Thi'srinvention. relates; t' the: takingeofi-x chibre' web's; "orfieecess from smoothrollers such -.for example: as" those' used for crushing foreign sub-.- stances. or bodies: in the treatment of thinlyspreadout webs. especially as; disclosedin U. S.

Patent=No. 2;075;l56.- 4

Hitherto it has been customary to deliver-the web or fleece-from between the crushing rollers on" to an" endless band or lattice mounted close to-"th'e rollersanddriven at a speed approximating: the: surface speed of thecrushing rollers.-

CertaiWmaterials; instead of passing: freely, off the? delivery end 'o'f the lattice; tendto adhere I thereto and mayalsoadhere: to the crushing and rotating" in a direction and-1 at a. relative speed that ensures a: condensing or thickening action onithe web before itis' removed by stripping means; The d'o'ffing 'roller is covered with card clo'thingor its equivalent.

The dotting roller can-be set" in close prox= .i'mity' to the lower of a paiifl of crushing rollers in such" a position thatth'e web' is allowed to dehere to said lower roller for a given distance' before being removed by'tlie'dofing rollers The latter may have the ends of the wire teeth of the-card clothing set in such' away that these are rearwardlyinclined fiom their direction of rotationso' that fibres of: the web are forcibly pushed between the wire teeth to be carried round to the stripping point'.

Referring. now to. the accompanying drawings in which an embodiment of this invention is shown by way of example: v

Fig. 1 is a side View of crushing apparatus for treating; textile webs of fibreswith the improved device associated therewith;

Ffig.v 2 is a plan view of Fig; 1;

Fig; 3 is'arside view of the crushing rollers with thefeeding and doffi'ng'rollers; c

In one embodiment of the invention, as applied to the apparatus disclosed in the aforesaid patent,- the thinly spread out Web I, produced ona' carding engine andpassed between the two superposed crushing rollers 2, 3, is removed from the: lower crushing: rollerby a: doffing roller. 4'. 'I'helatterlis covered withcard clothing whose wires have their tipscinclin'ed rearwardlyrelae tire to. the: direction of rotationqoifthe-doffer-rol1- the same or a less speed than such roller.

Thedofiing action takes place at a'desired' point (B;-- g., level withthe axis of the crushing, roller)- aiter' the: web has passed: partially around the lowerrolleriromthe'nip of the: two rollers. The

' wires'of the dofiing roller: stop or obstruct: the

fibres of'the crushing roller. and thus the 5 fl.-

'bres are pushed between such wires to be carried round the dofier fora given distance to a stripping point. The-speed of' the dofferand its arrangement is such that the. thin web" is caused to become more condensed: or thickened and thus when stripped'off can produce. stronger slivers oi' bands'for conveyance to the next process; X The" do'ifing roller may bedriven: in. any convenient mannerand its speed may be variable at will. In the construction shown the dbffil'lgroller' is driven fi'om the pulley '5, on shaft 6,throu'gh means of the gear wheels 1, 8; 9 and lOi Gear wheel 1 is mounted fixedly on the shaitli'of the" crushing roller 3 whilst the gear wheel 8 i's'carried by a stud l I mounted in the carrier plate 12 which is-secured to the main frame 13 of the apparatus; The gear wheel'9' is carried by an armwhich is pivoted on the stud l 1,50 that it can be released for the-wheelf9 to' beswung out of engagement with gear wheel I0 for the latterto be changed when a change of'speed isidesired. y

Thedofii'ngroller-can be mounted in any con venient manner and in the drawingsisshown with the ends of' its; shaft I5 mounted in end bearings [6 which are carried sli'olably on horizontal. rods IT. The latter are supported in fixing; brackets |f8 and screw, threaded to receive adjustable lock nuts 19 which hold the bearings IS in an'adjusted position when the doihng-roller has been set to its desired positi'on relative to the roller 3. In this manner'the dofiing roller can have a fine setting: for deciding the depth of penetration of the fibres into thewires on the dofling roller to suit the thickness andItype of web being crushed.

' Theweb, is, strippedrfrom the dofler in any convenient manner, e. g., by means of'a known form ofIfl-y comb 20 whose shaft 2| is mounted on the needle bearer shafts 22 of. the endibearings 23 which are adjustablyjlocked in; position on the forehead rods 'Ilib'y *lockLnutsM. The comb is driven from the pulley 5 onthe roller shaft through belts 25, 26, multi-pulley 21 3 mounted freely'on shaft [5 and twin pulley 28 which oscillates the shaft 2! through the usual mechanism 29.

If so desired the fly comb may be replaced by some form of stripping-devicesuch as a small roller having card clothing as used on the fancy of a carding engine and rotating in the same direction as the doifer. Alternatively, a rotatable element having beater blades could be used. The speed of operation of either 'of these devices may be adjustable. Drafting means could be used to facilitate the removal of the web. 1

1 ing said dofiing roller at surface speed less than The web of fibers detached from the doffing roller can be delivered on to any form of conveyor, e. g., side or central draw, ball and bank feed, parallel fibre feed or the like. Moreover, the aforesaid doffing roller could be in another position to that before described, e. g., the axis of the roller could be in the same plane as the nip of the superposed rollers and may even take fibres off the upper smooth'roller.

Furthermore, it is known that the web detached from the doifer of a, carding engine is led by means of a lattice or a tin roller to the nip of the aforesaid crushing rollers 2, 3, or other smooth rollers. However, if the web is very thin such conveyor means are not sufficient to keep the fibres under proper control and in addition both the lattice and the tin roller; may become soiled by oil, and consequently the thin web will stick to them and break. The present invention is intended also to overcome these difiiculties and to makethe entrance side as near foolproof as is possible, so that it does not need attention on the part of the operator. It is proposed to substitute for the latticeor tin roller a pair of conveyor rollers, 34, 35, of small diameter.

These rollers are covered by ordinary card clothing (filets) of the normal wire density of carding machine stripper rollers, both revolving in'the same direction as the bottom roller 3, of the crushing apparatus and the wire ends are arranged to be pointing oppositeto the direction of motion. The conveyor roller 34 next to the crushing roller is set near to it and the second roller 35 is almost'touching the first. Their surface speed is slightly less than that of a crushing roller 3. The web stripped from the carding dofier is, simply dropped onto these conveyor rollers and they carry it automatically to the nip of the crushing rollers without further at tention being givento them. The two conveyor rollers tend to keep each other clean and thus need cleaning or fettling only at great intervals. A suitable mounting for these conveyor rollers comprises a pair of horizontal (they may be in--' clined) supporting rods 36 each secured to the main frame H by brackets 3'! and screw threaded to enable the two pairs oflock'nuts 38 to be employed to adjust and then lock the end bearings 39, 49 which carry the shafts 4! of the rollers 34, 351 ,Thus the latter can be set in relation to each other and to the roller 3 in a simple manner. These rollers 3d, 35 have driving connection through gear wheels 42, 63 and 44 and a gear wheel 45 is interposed between the wheel 42 and the before named wheel I.

In the above manner the control of the web is greatly improved, the desirable formation and treatment of very thin webs is possible without drawback and a thin webcan be condensed into a thicker web or sliver to withstand further handling and conveyance.

What I claim and desire to secure by Letters Patent is:

and in a direction opposite to that of said smooth surfaced roller from, which the adhering web is to be removed, the doffing roller being disposed with the surface thereof in such close proximity to the surface of said smooth surfaced roller that by coaction of the rollers the fibre web is forced onto the card wires of the doffing roller and continuously condensed thereon to transfer the whole web from the smooth surfaced roller to the doffing roller without disruption of the web, and means for stripping the condensed'web from the dofiing roller at a point remote from the smooth surfaced roller. a

2. A machine according to claim 1 in which the means for mounting the doffing roller in juxtaposition to one of the smooth surfaced rollers comprises movable shaft bearings with screw ad-. justing means for adjusting the spacing-of the cloning roller with respect to the crushing roller.

3. In a machine for removing foreign-bodies from fibre webs produced one carding engine, the combination withja'pair of hard smooth surfaced crushing rollers rotating one on the other of a plurality of juxtaposed side by side card clothed conveyor rollersmounted parallel with each other and disposed parallel to and immediately in advance of said crushing rollers to feed a fibre web to'the nip of said crushing rollers, a card clothed doffing roller mounted on an axis parallel to and with its surface in juxtaposition to at least one of said crushing rollers to receive the web therefrom, means for driving said con- -veyor rollers in the same direction as and. at a surface speed not faster than that of said crushing rollers and for driving said dofling roller at a speed less than and in a-direction opposite to that of the crushing roller from which the web is to be removed to effect the feed of the web to and removal of the web" from the crushing rollers without disruption of the web and for condensing the web on said doffing roller and means for stripping the web from the dofiing roller.

4. A machine according to claim 3 in which the wire ends of the card clothing of the conveyor and dofiing rollers are pointed in a direction opposite to the direction of rotation of the rollers.

LAWRENCE CROWTHER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Great Britain of 1887 

